“In my former book, Theophilus, I wrote
about all that Jesus began to do and to teach until the day he was taken up to
heaven, after giving instructions through the Holy Spirit to the apostles he
had chosen. After his suffering, he presented himself to them and gave many
convincing proofs that he was alive. He appeared to them over a period of forty
days and spoke about the kingdom of God. On one occasion, while he was eating
with them, he gave them this command: “Do not leave Jerusalem, but wait for the
gift my Father promised, which you have heard me speak about. For John baptized
with water, but in a few days you will be baptized with the Holy Spirit.” Then
they gathered around him and asked him, “Lord, are you at this time going to
restore the kingdom to Israel?” He said to them: “It is not for you to know the
times or dates the Father has set by his own authority. But you will receive
power when the Holy Spirit comes on you; and you will be my witnesses in
Jerusalem, and in all Judea and Samaria, and to the ends of the earth.” After
he said this, he was taken up before their very eyes, and a cloud hid him from
their sight. They were looking intently up into the sky as he was going, when
suddenly two men dressed in white stood beside them. “Men of Galilee,” they
said, “why do you stand here looking into the sky? This same Jesus, who has
been taken from you into heaven, will come back in the same way you have seen
him go into heaven.””

The fact is that you know the Gospel,
even briefly, you can tell others

1 Corinthians 15:5-8

“and that he
appeared to Cephas, and then to the Twelve. After that, he appeared to more
than five hundred of the brothers and sisters at the same time, most of whom are still living, though some have fallen asleep. Then
he appeared to James, then to all the apostles, and last of all he appeared to
me also, as to one abnormally born.”

“And so John the Baptist appeared in the
wilderness, preaching a baptism of repentance for the forgiveness of sins. The
whole Judean countryside and all the people of Jerusalem went out to him.
Confessing their sins, they were baptized by him in the Jordan River. John wore
clothing made of camel’s hair, with a leather belt around his waist, and he ate
locusts and wild honey. And this was his message: “After me comes the one more
powerful than I, the straps of whose sandals I am not worthy to stoop down and
untie. I baptize you with water, but he will baptize you with the Holy
Spirit.””